REPORT OF THE ENTOMOLOGIST. 191 



AGRICULTURAL EXPERIMENT STATIONS AND WHAT IS BEING DONE 

 BY THEM IN THE DIRECTION OF INSECT INVESTIGATION. 



Since the establish meut of the agricultural experiment stations in 

 the several states under the provision of national legislation known as 

 the "Hatch bill," the subject has received quite an impetus. 

 There are now at least a dozen of these stations that employ entomol- 

 ogists whose sole duty is the investigation of injurious insects with a 

 view to finding remedies against their ravages. Several of these 

 stations are expending their greatest efforts in this direction, while 

 others of the stations are less liberal with their funds in aiding their 

 entomologists. Of course the entomologist with only a salary cannot 

 be expected to obtain the results secured by one who is provided with 

 a well equipped laboratory and a good working library, together with 

 funds ample for carying on such field experiments as are absolutely 

 essential to success. 



Here in Nebraska several bulletins have been prepared by the ento- 

 mologist and issued from the station. Several lectures have been 

 prepared and delivered before horticultural and agricultural meetings, 

 and occasional papers on special insects prepared for the press. There 

 are now several other bulletins under way and nearly ready for the 

 printer. One of these bulletins is a treatise on the grasshopper, katy- 

 dids, and crickets of Nebraska, which will contain descriptions of about 

 240 distinct species of these insects, the majority of which are directly 

 injurious to agriculture and horticulture. A bulletin on plant-lice 

 and one on beet insects are also under way. These works will contain 

 chapters devoted to remedies, as well as to the disease, and natural 

 enemies of these insects, vertebrate and invertebrate. With the aid 

 of the farmers, fruit-growers, and gardeners of the state, it is the inten- 

 tion of the station officers to continue this work as rapidly as pos- 

 sible. Of course, without much of this outside assistance we can do but- 

 little. We are willing to do the work if the other parties will only 



furnish a portion of the material which they want studied. 



( 



THE APPLE-TREE ROOT LOUSE. 

 (Schizoneura lanigera Hausm.) 



This plant louse, which appears in two forms, has become quite 

 plentiful in portions of the state within the past two or three years. 

 One of these forms (Fig. 1) works upon the roots of the tree from 



